Centrifugal pump.



F. LOBNITZ.

GENTRIFUGAL PUMP.

APPLICATION FILED NOV. 9, 1912.

j I 2 J 3 W ii; g

Io especiallgz I a lyuuse V e; yic mty, o he" n ii ,Shafi Of.;theipressu reon the one hand be};

incomingsuff cient- 1y; g t to fiorbg t gritty. 1 v liquid .iiit th -13 I I I ;0n1;Y deprives th atter of t proper-Supply v haf g; Wh no oi'llubrica nt; abut a150, ie :ipt to do v c ons idle able; gd amagem s nthexsha ft-s of .such ,rpumps' '3 palsy =inereasegaugomgbigally 1 and :blierb'v E also amiomg tioally. 1111; ar d? m s: am" astqmff if nk e are; usually revol d amvery-high speeds, 22 1"; on-=;the othep hand, falling' of the pr'essu'gi 25 to such extent that- Qhe lubricant, whichj sj ag usually either foroe d or mechanically fefij, i ap zfl r ximm-t be rin a be '.qu ickly wggtegiz Under the'; gpg'es'enti .ifive v tion these dgaqvbackskayg loye'rco'me lby} pr 80 :viding; means whereby, as ehe, pressure; v

I rieis 1n the-p nup, the; press re op t hei an Lubricant ,feeding it W111 a top et cal ly I Vary co1;responding1y, ,so thafi ifgthe :pr

= sug'e in thexiqinity 95E the pumgslh creases, the pressure on the lubri 2 sur xhe .pngper lbricggion f t s iafi other? gageehezm 1 h ws ,b p; mpe y fe w v sc 1 or inz-dang wfi heme. fQ ig -pressuj tenieiide-jzibq mime 31 isiafeaiwb e h fiuieif p ENTRIFUGAIF PUMP;

prq ded wh reby; w en w s u l pui jiin 'actio'n; v

8111011 may be be turned or when the othei' hau'sted. On thedra'ifings'thegame it .erence' lete ftefrsKvhereVef s mi ar pa -v "2:"

a "represents the "pump ishai t hfiifiiig' with ijtf-peari g a;

repeated indicate {he saifie or i of I hihi ic ant "flbeeo e e'xh aj-listed ing with an. inereasedpr'essure.correspond ing to the increase of pressure within fixe pump. J-Vhen thepressure decreases with n the pump the pressure onthe' piston/halso decreases, and 1the.' compressed air between the pistons-iand h is allowed tobxPzind thereby reducing lthe .pressure on the. lubricant. The-piston I: is. as illustrated,'.

of'greater. diameter thanthe piston and,

in consequence thereof, lubricant is snp-.

plied to the bearing or bearings at a pres sure per unit areagreater than the pressure per unit area "within'the pump. 7 d

In order to fi'll up the lubricant supply vessel readily when desired, I may. connect i't'hy means ofa pipe 0, with a smallsuction and force pump p adapted :to be operated by hand 01" power, as found most desirable. By operating the .pumpjlubricant-can be drawnfrom a bucket q-into the pump c'ylin derthrough 'a- -suitable non-return valve "1' and then beforced' out through a suitable valve t into the'pipe 0, and' vessel f filling.

the samerhelow the floating. piston and at the same time forcing back "both pistons h i. r

, u is a pipe leading from the airspace s; to a gage-u in the pilot-house m or engine room or othersuitable p'osition. w is a pipe leadlngffrom the: plpem to-a gage w. 1n the vieinityof the gage? By m'eansof these gagesth'e pressure in the space s'actingQon P m the lubricant and the pressure in the can: be- 1ndicated to the operator,-

ment with .twol-ubricant supply vessels f, f

In this" case the vessels 7, f,-' are connected. by atwo way-cocky -.to;the pipe v "and the cylinders Zare connected by a :two way cock 3 to the pipe "By turningthecocks y,-

y either of the-devices can be put into-operative connection" .yvith-the pipe v. 'The cocks can be operatedby hand or they. may

be arranged to be'fopei'ated electrically, nei'lmi tically," 'or-mechanically in any well own .and-ysuitable manner whenever the lubricant in one ofthe "vesslelsQU- or f.',) is

exhausted, so as to turn on .a 'supply of lufbricant from the other vessel.

the pump.

Having now the said second piston,

'2. The ficoinbination with, a'- centrifugal pump of a.=vessel containing lubricant and in communication with the pump shaft i fluid. from the second piston.

In Big 2 I havejsliown a duplex arrange Of course the parts offithe mechanism. would be made in: proportions suitable 4 for Y full'v fdescribed my memos: what I claim an'ddesiie tosecure by Letters ing, a piston inthe lubricant vessel, av sec:

piston in said vesselan air spacehetweela said-pistongand means for admitting pres sure fluid-from thepump to the hacleoisaid second piston.

The combination with centrifugal pump, of a vessel containing luhrlcant and in communication with the pumpshafthear ing a piston in the lubricantvessel; a second piston in said. vessel, an. mnspacehetween said. pistons and filled with an underpres sure, and means for admittingpressure pump to' the hack of said.

4. The combination with a centrifugal pump, of a vessel oontaining lubricant and inc'onini'unicationwith the pump shaft hear .in'g, a piston in the lubricant-vessel, a second piston in said vessel, an air space betweensaid PIS fQHS a pipe with gage thereon. communicatingwith said-air space, and means -for admitting. pressure fiu d'from the pump to-the back of said sec 0nd piston.

5-. flh'e" combination .with a centrifugal 'pump,- of a vessel'contaifiing lubricant and in communication with the pump shaft hearing, a piston inthe lubricant vessel a second ASlOll in said vessel, an air. soace between.

said pistons. means for indicating the pres sure in the pump, and means for admitting pressure'fiu d from the pump to the ba'ckof .s'a id second pi ston'.

6. -The1 combination with a centrifugal pump of L -"vessel containing-lubricant and incommunicationwith the pump shaft hearing, a piston in the lubricant. vessel. a second.

piston insaid vessel. an air-space -l. e.c.\'v een said plstons ga"cylinder. a piston in the cylinder and connected with the second piston .in thelnbricant'vcssel and means for admittmg'pressure fluid from thepump to said cylinder.

-7. The comhination with a centi'ifugal pump. of' a' Vessel containing lubricant and in-communication with the pu mpsha ft bean ing, a piston in thelubricant vessel, :1. second piston in said vessel, an air space-between said pistons, a pipe with gage there'oncom- .x nnnicating'wi.th saidair spacega pipe with gage thereon communicating with "the pump, a cylinder of greater diameter than, the 111-- hricant vessel. :1 piston in thecylinder and connected with the second piston in the'lm 'bi'icant xessel a n'd means for admittingfpres sure .fiuid' from the pump .to said cylinder.

The combination with. a centrifugal pump, of two vessels each containing luhri- 'cantia pipe IGfldlIlfI therefrom to the shaft bearing, two pistons in each vessel with compressed air therehetwcen. a-pipe connection from the interior of the pumpto two cylinders, a pistonin each r vlinde'r said cylinderpistons home each c nnected to one of .the pistons in eachlubricant vessel, means I Inn-mas whereby (moor othen of the cylin- WVitnesses:

Wh -=reby one or other of the lubricagt ves- In testimony whereof I gfil'x my signature (-1 .1) bq put into communication Wit-h the in presence of two Witnesses. p11); iuqchng t0 the shaft bea'mng, and FRED LOBNITZ.

" (mm can He put into communication with the H. D. FITZPATRICK,

pipe leading to the interior 9f the pump. MARGARET FINDLAY YOUNG. 

